Pd nanoparticles supported on low-defect graphene sheets: for use as high-performance electrocatalysts for formic acid and methanol oxidation

Huang, Huajie; Wang, Xin

doi:10.1039/c2jm33727d

Cited by 168 publications

(106 citation statements)

References 93 publications

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“…67 ECSA, usually obtained from CV technique, is also an important technique to investigate the electro-catalytic activity. Figure 6A The typical peaks are well defined for all the nanocatalysts as peak I: hydrogen oxidation peak, peak II: oxidative desorption of H and adsorption of OH − , peak III: oxidation of Pd, peak IV: reduction of PdO, and Peak V: reductive adsorption/absorption of H. 68,69 Integrating peak IV is usually used to estimate the ECSA value based on the columbic charge for the reduction of PdO using Equation 2.…”

Section: Resultsmentioning

confidence: 99%

Multiwalled Carbon Nanotubes Composited with Palladium Nanocatalysts for Highly Efficient Ethanol Oxidation

Ding

Wei

et al. 2015

J. Electrochem. Soc.

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Carboxyl multi-walled carbon nanotubes (MWNTs-COOH) decorated with different palladium (Pd) nanoparticle loadings were synthesized by thermally decomposing different amounts of palladium acetylacetonate (Pd(acac) 2 ) in a refluxing xylene solution with a fixed amount of dispersed MWNTs-COOH. The increased ratio of D band/G band and the decreased area ratio of oxygen containing groups (COOH, C-O and C=O) to C-C group suggested an increased occupation of defects on MWNTs. Transmission electron microscope (TEM) revealed different distributions of Pd NPs on the MWNTs with the variation of Pd(acac) 2 amount and the particle size increased with increasing the Pd loading. A relatively higher conversion of Pd(acac) 2 to Pd (76.21%) was achieved when the initial precursor ratio of Pd(acac) 2 to MWNTs was 2 : 1 (product denotes as Pd/MWNTs-(2:1)). The Pd/MWNTs-2:1 catalysts were demonstrated to exhibit the most efficient performance toward ethanol oxidation reaction (EOR) among all the precursor ratios, which is evaluated by the highest Pd mass-based peak current density (1.23 A/mg Pd ) and stable current density (0.175 A/mg Pd ) in cyclic voltammetry (CV) and chronoamperometry (CA). In addition, both reduced charge-transfer resistance and increased reaction kinetics with increasing the Pd loading were obtained from electrochemical impedance spectroscopy (EIS) and Tafel characterization.

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Section: Resultsmentioning

confidence: 99%

Multiwalled Carbon Nanotubes Composited with Palladium Nanocatalysts for Highly Efficient Ethanol Oxidation

Ding

Wei

et al. 2015

J. Electrochem. Soc.

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“…There are several methods such as thermal, chemical and electrochemical reduction to obtain hybrid nanostructures graphene based Pt and Pd [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. There are also photo-catalytic and electrolysis methods for the synthesis of graphene based electrocatalyst [31,32].…”

Section: Introductionmentioning

confidence: 99%

Rapid reduction of GO by hydrogen spill-over mechanism by in situ generated nanoparticles at room temperature and their catalytic performance towards 4-nitrophenol reduction and ethanol oxidation

Barman

Nanda

2015

Applied Catalysis A: General

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“…For the Cu-SOCBP/C catalyst, the kinetic/diffusion current region was observed from 0.2 V to 0.62 V, and in this region, the reaction rates were controlled simultaneously via charge transfer and the mass transfer rate. At the same time, the diffusion control region of Cu-SOCBP/C was found under 0.2 V; in this region, the reaction rate was only controlled via the mass transfer rate, and the linear polarization curves have well-defined plateaus with a constant maximum current value [33]. RHE for the Cu-SOCBP/C catalyst [17].…”

Section: Linear Sweep Voltammetrymentioning

confidence: 91%

Carbon-Supported Copper-Based Nitrogen-Containing Supramolecule as an Efficient Oxygen Reduction Reaction Catalyst in Neutral Medium

Zhao

Chu

et al. 2018

Catalysts

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Abstract:In this work, a nitrogen-containing bidentate ligand named 5,5 -(9-octyl-9H-carbazole-2,7-diyl)bis(1,10-phenanthroline) (OCBP) was synthesized as a nitrogen precursor for making an oxygen reduction catalyst. The 1,10-phenanthroline unit provides a coordination site for copper ions, and the resulting Cu-N x unit may be responsible for the catalytic activities of the catalyst. Carbon black was selected as a support to improve the electroconductibility of the resulting catalyst. The metallo-supramolecule (Cu-SOCBP) was dispersed on the surface of Vulcan XC-72 carbon and was used as a catalyst (designated as Cu-SOCBP/C) for the oxygen reduction reaction (ORR). The microscope structure and surface components of the catalyst were acquired via scanning electron microscopy and X-ray photoelectron spectroscopy, as well as X-ray powder diffraction. The electrochemical property and ORR mechanism of Cu-SOCBP/C were analyzed using a variety of electroanalytical methods including cyclic voltammetry, electrochemical impedance spectroscopy, and linear sweep voltammetry. These results show that Cu-SOCBP/C was successfully synthesized and that ORR was achieved mainly via a four-electron transfer process to water. Thus, Cu-SOCBP/C was an effective catalyst and might have potential application as a cathodic catalyst in microbial fuel cells, which operate in an aqueous medium.

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Pd nanoparticles supported on low-defect graphene sheets: for use as high-performance electrocatalysts for formic acid and methanol oxidation

Cited by 168 publications

References 93 publications

Multiwalled Carbon Nanotubes Composited with Palladium Nanocatalysts for Highly Efficient Ethanol Oxidation

Multiwalled Carbon Nanotubes Composited with Palladium Nanocatalysts for Highly Efficient Ethanol Oxidation

Rapid reduction of GO by hydrogen spill-over mechanism by in situ generated nanoparticles at room temperature and their catalytic performance towards 4-nitrophenol reduction and ethanol oxidation

Carbon-Supported Copper-Based Nitrogen-Containing Supramolecule as an Efficient Oxygen Reduction Reaction Catalyst in Neutral Medium

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